THE DIGESTIVE SYSTEM OF
VERTEBRATES
BIRDS: Emu

Emu (photo
by Dr. Ed Stevens) (from CD
Chapter 2)
Figure 5.6. Emu (Dromaius
novaehollandiae) digestive tract (Stevens
& Hume 1995) (from CD
Chapter 5)
Table 7.3. Mean digesta retention
time in birds (from CD
Chapter 7)

Digesta transit time of birds tend to be
short, and particles are generally retained longer than fluid digesta,
but fluid was selectively retained in the ceca of the herbivorous
ptarmigan. (From Stevens and
Hume 1995)
Table
9.6.
(from CD
Chapter 9)

Dashes
indicate absence of information. Contributions of SCFA to maintenance
energy were estimated from the rate of SCFA production by in vitro
isotope dilution or measurements of digesta flow. Total maintenance
energy was either calculated as twice the BMR or assumed to be
equivalent to ad libitum digestible energy intake in captive,
nonreproducing, adult animals. (From Stevens and Hume 1995)